éléments piézo-électriques,申请号FRD65072-传众专利搜索

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发明名称	éléments piézo-électriques
摘要
申请公布号	FR65072(E)	申请公布日期	1956.01.26
申请号	FRD65072	申请日期
申请人	LE MATERIEL TELEPHONIQUE	发明人	LOVELOCK LEONARD ROBERT;TULBY WALTER RAYMOND MASON
分类号	H03H3/02;H04R17/00	主分类号	H03H3/02
代理机构		代理人
主权项
地址

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